Calipers and similar tool.



W. B. GEORGE. CALIPERS AND SIMILAR TOOL.

APPLICATION FILED FEB. 16, 1915.

Patented Feb. 8, 1916.

emit STATES PATENT orrion.

ILLIAM B. enoReE. oreHIoAeo; ILLInoIs.

' oALIPERsAnn sIiu'ItAR TOOL.

certain new and useful Improvements 7. in Calipers and Similar Tools; and I do hereby declare that the following descriptionfof my said invention, taken in connection with the accompanying "sheet of drawings, forms a full, clear, and exact specification, which will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in calipers and similar tools andmore particularly to that class known as registeringcalipers. The principal objects of my invention are to so construct a tool of this character that it may be easily andconveniently manipulated, to so locate and arrange the graduated scale that it may .be quickly and accurately read, to make provision for adjustmentto take up wear, and to provide both a-vernier and regular scale on the same instrument.

To attain these and other objects my invention consists in the novel and peculiar arrangement and combination ofparts as hereinafter first set forth and described and particularly pointed out in the claims.

In the sheet of drawing Which serves to illustrate my said invention more fully, F igure 1 represents a side elevation of my im- 1 proved tool. Fig.'2 is an edge elevation of the tool looking in the direction of the arrow X in Fig. 1. Fig. 3 is a fragmentary side elevation of my improved caliper constructed with straight ins delegs. Flg. t'ls-a fragmentary side elevation of my improved caliper having correspondingly curved opposed outside legs. Fig. 5 is anend view of my improved caliper. Fig. 6 is an enlarged fragmentary longitudinal section on line 66 of Fig. 1, looking in the direction of the arrows. Fig. 7 is a fragmentary section on line 77 of Fig. 1 to illustrate the'joint construction. Fig. 8 is'a fragmentary edge view to illustrate the means for adjustment of the graduated segment Fig.9 is a fragmentary side view to show the Vernier scale on the side of the segments opposite th regular scale shown in Fig. 1.. 1

, Likeparts are indicated by corresponding B. GEORGE,

I Specification of Illetters Patent. I P ajtented Feb. ,1916,

Application fil ed February 16, 1915. Serial No. 8,441.

characters or symbols oflreference all the figures of the drawings.

- My-improved tool comprises, two members each preferably of angular form which in Fig. '1' of the drawings I respectively designateby the letters A and B. These members when properly assembled cross each other at;a medial point and are pivoted to. each other by a, pivot '1 provided with opposedf circular flanges or heads 2 between which the members are pivotally mounted. As

1 shown in Figs. 51, 2, and 7, the members are recessed or cut out to provide opposedv concentric walls or shoulders and 4. y r

The member A, as shown in. Fig. l,.con .sists preferably of a curved caliper legf5,

projecting on one side of its pivot point, -a hand grasping part6, projecting on the opposite side of its, pivotpoint, and a segmental arm 7 extending laterally from the slotted. as shown at 8 to provide a bifurcated the outer end of the hand grasping part is extremity andthe upper fork of said end is also provided-with-two holes 16. The purpose of this construction is to provide'means of adjustment for the segmental arm 7, the

inner end of which is fitted in the slot 8, and

adjustably fastened there by screws 10 1 which fit through the transverse slots 9 and screw, into. suitable openings in the segmental arm. r j i v I The other member B likewlse consists of a caliper leg 11' whichis preferablyof angular form and extends on one. side of its pivot point, a handgrasping part 12, extending on the othersideof its pivot point,l and a segmental arm 13, which is'preferabl-y made considerably shorter than the segmental arm 7, and is suitably fastened at its inner end by a. screw 14. to the outer eXtremit-yof the hand-grasping part 12 and in a position exterior to and concentric-with thesegmental arm' 7, as-shown in Fig. 1. '1

It is. now tobepointed out that the segmental arms 7 and- 13 are disposedin the ber A, which receives'the end of the segmental arm 7, and by making'the end ofthe hand grasping element ofv 'thejmember B however, be understood that I may in some.

instances omit one or the other of these scales from my lnvention or employ other suitable means of registering.

ln Fig. l, I have shown a series of graduations 15, on the inner segmental arm 7 which represents the regular scale. In F1g- 9, the opposite sides or faces of the inner and outer concentric segmental arms 7 and 18 are illustrated, with a series of Vernier scale graduations 17 on the arm 7, graded at about forty to the inch, and a registering series of vernier graduations l8 graded at about twenty-five in ea ao inch on the arm 13.

The caliper legs of this improved tool may be made in any desired shape suitable for either inside or outside Work, for instance, in Fig. 1, the leg 5 is curved while the leg 11 is angular, in Fig. 3 both the legs which are indicated by a similar numeral 19 are straight and of corresponding form suitable for inside work, and in Fig. 4: both the legs, indicated by the same numeral 20, are curved correspondingly and opposed to each other, being suitable for outside work.

The members A and B are maintained in adjusted position by a stud 21 passing through a boss 22 on the member 12, which stud is possessed of a slot embracing the inner edge of the segment 7, and, upon its outer or opposite end, is possessed of a suitable screw thread, engaging a knurled nut 23, or like media, whereby the said segment 7 and the member 12 may be fixedly clamped together, as clearly seen in Fig. 6.

It will be noted that the hand grasping part 12 of the member B is provided with an opening 24 of sufficient size to permit the insertion therein of the thumb of the operators hand and that the opposite hand grasping part 60f the member A also is constructed with an opening 25 which is longer than the opening 24 to permit the remaining fingers of the hand to be entered there in. The object of this construction is to provide a firm and secure grasp for the hand of the operator. It should, however, be understood that these openings may be omitted if desired. 7

While I have illustrated and described a preferred form of construction for carrying my invention into effect, this is capable of a wide range of variation and modification Without departing from the spirit of my invention, I therefore do not wish to be limited to the details of construction herein set forth but desire to avail myself of such variations and modifications as fairly fall within the scope of the appended claims.

Having thus fully disclosed my invention I claim as new and desire to secure to myself by Letters Fatent of the United States 1. An article of the class described including a pair of members pivoted together intermediate their length and possessed of opposite ends, measuring legs comprising one of the ends of said members, the opposite end of one of said mem ers being bifurcated, an arcuate registering blade having one end fixed in said bifurcation, there being slotted means in said blade permitting lateral adjustment thereof, and a coacting blade, fixed to'theopposite end of-the other of said members.

2. An article of the class described including a pair of members pivoted together intermediate their length and possessed of opposite ends, measuring legs comprising one of the ends of said members, the opposite end of one of said members being bifurcated, an arcuate registeringblade having one end fixed in said bifurcation, and a coact ing arcuate blade, the inner periphery of which contacts the-outer periphery of said first named blade and fixed to the op posite-end of the other of said member 3. An article of the class described including a pair of members pivoted togetherintermediate their length and possessed of opposite ends, measuring legs comprising one of the ends of said members, the opposite end of one of said members having an arcuate blade extending laterally beyond said member, and the other of said members being possessed of a coacting arcuate blade, the inner periphery of which contacts with the outerpe riphery of said first named blade, both of said blades being located in the same plane.

t. A tool of the class described comprising two members pivotally connected at an intermediate point, and having measuring legs on one side of said pivoting point, hand grasping parts on the opposite side of said pivoting point, one of said hand grasping parts having a slotted extremity, a segmental registering arm adjustably secured in said slotted extremity, another segmental registering arm secured to the other hand grasping part and concentric to the adjustable segmental arm. I

5. An article of the class described including a pair of members pivoted together intermediate their length andpossessed of opposite ends, measuring legs comprising one of the ends of said members, the opposite end of one of said members having an arouate blade extending laterally beyond said members, and the other of said members being possessed of a coacting arcuate blade,

the inner periphery of which contacts with the outer periphery of said first named site end of one of said members having an arcuate registering blade, and means near Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, I

the opposite end of-the other of said members engaging the inner edge of said blade and rendering said members immovable with respect to each other.

In' testimony whereof I have hereunto set my hand in the presence of two substcribing witnesses.

WILLIAM B. GEORGE. In the presence of C. S. STARK, W. HARDING.

Washington, D. 0.. 

